545088 五、 發明說明 ( Ο 本發明係關於根據申請專利範圍第1項前言之用於操 作 電 燈 之 鎭 流 管 〇 發 明 領 域 本 發 明 係 關 於 操 作 電燈用之 現代電子鎭流管，其 除了 倒 相 器 及 其 控 制 裝 置 外，尙有 一微控制器，用於監 測及 控 制 鎭 流 管 及 其 操 作 之電燈之 功能。微控制器亦與 中央 控 制 •單 元 有 雙 向 溝 通 ，中央控 制單元放置在鎭流管 外 側 並 用 於 室 內 照 明 系統之中 央閉合環路或開口環 路控 制 室 內 照 明 系 流包括複數個照明設備及複數個鎭流 管。 習 知 技 術 歐 洲 公 開 串 請 案 EP 0 5 64 8 95 A1描述用於操作低壓 放 氣 電 燈 之 電 子 鎭 流 管。這個 鎭流管包括一倒相器 ，用 於 倒 相 器 之 CD J 電； 供應電路 ，連接到倒相器之負〗 載電 路 用 於 供 應 電 壓 至 電燈，及 用於供應電壓至倒相 器之 控 制 電 路 之 裝 置 〇 如 上述，除 了倒相器之控制電路 以外 現 代 電 子 鎭 流 管 亦 具有一微 控制器，其用於監測 及控 制 鎭 流 管 及 與 其 連 接 之電燈之 作業，並可與位於鎭 流管 外 側 之 控 制 單 元 做 雙 向溝通。 爲了這些作業，微控 制器 需 要 一 恆 定 電 壓 供 應 ，其在鎭 流管之備用模式中亦 運作 即 是 繼 續 供 應 電 能 給微控制 器，直到電燈關閉及 倒相 器 不 運 作 時 〇 揭 示 於 公開申請 案0 564 895 A1之裝 置， 其 用 於 供 應 電 壓 給 倒 相器的控 制裝置，並不適用於 上述 S 的 〇 -3- 545088 五、 發明說明 (2) 發 明 槪 述 本 發 明 之 一目的 係提供給操作電燈之一般鎭流 管一改 善 之 微 控 制 器用之 電壓供應，此電壓供應一方面 可靠地 提 供 電 能 給 微控制 器，即使是在鎭流管的備用模 式中亦 然 另 一 方 面幾乎 沒有能量損失。 此 的 是 根據本 發明藉由申請專利範圍第1項 之特徵 而 達 成 〇 特 別是本 發明的有利組態係在申請專利 範圍的 依 附 項 中 描 述。 根 據 本 發 明之鎭 流管具有一倒相器，用於倒相 器之 DC電壓供應電路 ，其用於供應電壓給一或更多個電燈 — 微 控 制 器，其 用於監測及控制鎭流管或電燈 之作業 ’ 及 用 於 微 控制器 之電壓供應裝置。根據本發明 ，微控 制 器 之 電 壓 供應裝 置被設計成爲DC-DC轉換器， 其電 壓 輸 入 係 連 接到倒 相器之DC電壓供應電路之電壓輸出 5 而 其 電 壓 輸出係 連接到微控制器之供應電壓輸 入。 DC-DC 轉 換 器能夠 直接自由DC電壓供應電路整流 之AC 線 電 壓 產 生 微控制 器用之供應電壓。再者，在備 用模式 中 之 鎭 流 管 之電會b 消耗可以降低至約爲〇 . 5 W。 DC-] DC 轉 i換器之 ，電壓輸出亦有利地連接到用於 倒相 器 切 換 設 備 之控制 裝置之供應電壓輸入。DC-DC 轉換器 之 組 件 之 尺. 寸被設定成使用於供應給微控制器及倒 相器之 控 制 裝 置 之: 適當高電壓可在轉換器之電壓輸出處獲 得。 DC-DC 轉 換 器亦可 用於供應電壓至控制裝置。DC--4- DC轉 545088 五、 發明說明 ( 3 ) 換 器 有利地 具 有 —^ 降 低 轉 換 器 或 被 設 計成 降 低 轉 換器 ， 這 是 因 爲 操 作 微 控 制 器 所 需 的低 電 壓 DC 電 壓 可 藉 由降 低 轉 換 器 的 幫 助 而 以 —* 簡 單 方式而 產 生 5 並 且 使 白 DC電 壓 供 應 電 路 之 高 輸 出 電 壓 之功 率 損 失 很 低 〇 降 低 轉 換 器之 電 壓 輸 出 可有利地 由 電 解 電 容 器 所形成 以 便 使如 5 0mA 之 局 供 應 電 流 在如 200] ms 的 短 時 間 內 爲 倒 相 器 :的 控 :制 裝置 ：可 ‘獲 得 的 〇 降 低 轉 換 器 之切 換 設 備 及用 於 控 制 切 換 作 業之 閉 合 rm 路 控 制 裝 置 被 設 計成 爲 積 體 電 路 〇 結 果 可以 減少 降 低 轉 換 器 或 供 應 電 壓 至 微 控 制 器 之 裝 置 之 空 間 〇 特別是 降 低 轉 換 器 之 主 要 組 件 即 是 切 換 設 備 及 閉 合 環 路 控制 裝 置 5 可 以 積 體 成 爲 倒 相 器 之 開 □ 環 路 控 制 裝 置 ， 設 計成 爲 ASIC(應用特定之積體電路） 0 爲 了 能 夠 橫 跨 降 低 轉換 器 之 電 壓 輸 出 之 電 壓 下 降 設 定 成 一 想 要 値 所 以 提 供 能暫 時 中 斷 降 低 轉 換 器 之 切 換 設 備 之 切 換 作 業 之 設 備 〇 這 些設 備 有 利地包含 一 臨 界 開 關 5 其係排 置 至 降 低 轉 換 器 之 閉合 路 控 制 裝 置 之 —' 回 饋 分 支 中 〇 藉 由 臨 界 開 關 的 幫 助 ，橫 跨 降 低 轉 換 器 之 電 壓 輸 出之 電 壓 下 降 可以 以 一 簡 單 方式被 監 測 且 降 低 轉 換 器 之 閉 合 rm 路 控 制 裝 置 可 以 暫 時 的 被關 閉 或 啓 動 〇 特別 適 合做 爲 臨 界 開 關 的 是 齊 納 二 極 體 藉由 適 當 大小'的 齊 納 二 極 體 及 適 當 大小的 電 壓 分 割 器 的 幫 助， 降 低 轉 換 器 之 輸 出 電 壓 可以 被 設 成 想 要 的 値 〇 上述的 回饋 分支 藉 由 — 光 牵禹 合 器 與 源 電 位 電 氣 隔 離 以 便 排 除 定 期改 變 之 源 電 位 對 降 低 轉 換 器 切 換 設 備 -5 之 切 換 作 業 的 影 響 。爲 了 避 545088 五、發明說明（4) 免降.低轉換器所引起之無線電千擾，降低轉換器可有利地 配置声無線電干擾抑制設備。一小信號二極體及一電阻器 係有利地做爲無線電干擾抑制設備，二極體之陽極被連接 到降低轉換器感應器，且其陰極被連接到降低轉換器之 DC電壓輸出之正終端，電阻器之一端被連接到小信號二 極體·之陽極及降低轉換器感應器，另一終端係連接到框架 電位。小信號二極體，其只有很低的阻擋層電容，在放電 作業結束時有阻擋降低轉換器感應器之效應，而電阻器會 衰減電路之剩餘自然震盪，這是在每一次降低轉換器二極 體自導電狀態轉換成阻擋狀態時發生。 圖式之簡單說明 第1圖顯示根據本發明之鎭流管之方塊圖。 第2圖顯示第1圖中之鎭流管之降低轉換器之槪略圖 式。·· 第_ 3圖顯示第1圖中之鎭流管之降低轉換器之詳細資 料。 較佳實施例之描沭 % 第vl圖以方塊圖的表示方法槪略顯示本發明之一實施 例。jtt：鎭流管的主要組件爲一倒相器WR，特別是半橋 式倒相器，用於操作至少一低壓氣體放電燈LP，特別是 一螢洗燈。半橋式倒相器WR係由DC電壓供應電路 GLV·鱷入，GLV自AC線電壓產生400V-450V之DC電 壓。：PC電壓供應電路GLV爲了此目的具有一模組GL， 其連接到線電壓終端並包含一無線電干擾抑制濾波器及 545088 五、發明說明（5) 下游橋整流器GL，GLV尙具有一上升轉換器PFC，連 接到模組GL’之DC電壓輸出。上升轉換器PFC用於功 率因數校正並能造成大約正弦線電流排放汲。上升轉換 φ 器之電壓輸出或DC電壓供應電路GLV之電壓、輸出係由 中間電路電阻器C2形成。倒相器WR之供應電壓係提 供於形成做爲電解電容器之中間電路電容器C 2。開口 環路控制裝置S T包含用於驅動半橋式倒相器W R及上 升轉換器P F C之切換電晶體之驅動電路。它通常被設 計成應用特定積體電路，ASIC。此外，鎭流管具有微 控制器MC，其產生控制信號給開口環路控制裝置ST 之驅動電路以便驅動倒相器WR及上升轉換器PFC之 切換電晶體，並用於監測上升轉換器PFC，倒相器 WR及至少一燈LP之作業狀態。微控制器MC亦能經 由介面（未示）連接到中央控制單元（未示），其係配置在 鎭流管的外側，並用於整個照明系統之功能之中央控 制，其中根據本發明之鎭流管爲照明系統之一組件。 經由這些介面，微控制器或鎭流管自中央控制單元接 收控制指令以便開啓或關閉及調整至少一燈LP之亮 度。再者，關於鎭流管或至少一燈LP之操作狀態之資 訊經由這些介面被送至中央控制單元。用於供應電壓給 微控制器MC的是電壓供應裝置HLV做爲DC-DC轉換 器。爲DC-DC轉換器HLV之電壓輸入係連接到中間電 路電容器C2或至DC電壓供應電路GLV之電壓輸出。 D C - D C轉換器H L V之第一電壓輸出係連接到微控制 545088 五、發明說明（6) 器MC之供應電壓輸入而DC-DC轉換器HLV之第二電壓 輸出係連接到開口環路控制裝置ST之供應電壓輸入。 DC-DC轉換器HLV自提供於中間電路電容器C2之DC電 壓產生約5V的DC,電壓給微控制器，及至少12V之DC 電壓給開口環路控制裝置ST之電壓供應。DC-DC轉換器 HLV爲此目的包括一降低轉換器TS及下游固定電壓調節 器FS，其調節降低轉換器TS之輸出電壓至約5V之値給 微控制器MC。DC-DC轉換器HLV不管倒相器WR及上升 轉換器PFC之作業狀態爲何皆供應電能給微控制器。即使 是在鎭流管之備用模式中，當倒相器WR及上升轉換器 PFC關閉時，DC-DC轉換器HLV產生約5V之供應電壓給 微控制器MC。在此情況下，由模組GL整流之AC線電壓 橫跨中間電路電容器C2，做爲DC-DC轉換器HLV之輸 入電壓。 第2圖顯示DC-DC轉換器HLV之降低轉換器TS。降低 轉換器TS之電壓輸入係連接到中間電路電容器C2。橫跨 電容器C2之電壓下降做爲降低轉換器TS之輸入電壓。降 低轉換器TS具有切換設備T1，用於控制切換設備T1之 切換作業之閉合環路控制裝置RV，降低轉換器電感器L 1 ，二極體D1及電解電容器C1。電解電容器C1形成降低 轉換器TS之電壓輸出。閉合環路控制裝置經由回饋分支 連接到電容器C 1，爲了監測橫跨電容器C 1之電壓下降及 控制切換設備T1之切換作業。當開關T1被開啓時，電容 545088 五、發明說明（7) 器C1經由電感器L1自可在電容器C2獲得之整流AC線 電壓被充電。在電感器L1中，同時建立起磁場。二極體 D 1是在阻擋狀態。在開關T 1之阻擋相位期間，儲存在電 感器L 1 ·之磁場中之能量被耗盡並給電容器C 1。在此情況 下，電容器C1藉由電感器L1再充電在這段時間內，二極 體D 1係在導電狀態。可在電解電容器C 1處獲得之固定電 壓調節器FS及開口環路控制裝置ST之供應電壓係根據切 換設備T1之切換循環。 第3圖詳細顯示DC-DC轉換器HLV之降低轉換器TS。 切換調節器，被設計成爲積體電路且在商業上以TNY 253 表示，係被用做爲切換設備T 1。閉合環路控制裝置RV積 體於切換調節器T 1之中。切換調節器T 1之汲終端D係 連接到電容器C2之正終端。切換調節器T1之源終端S係 經由降低轉換器電感器L 1及正向偏壓二極體D2而連接到 電解電容器C1之正終端。再者，源終端S係連接到二極 體D!之陰極，其陽極係連接到電路之內部框架電位，切 換調節器T1之致能終端E係連接到電容器C1之回饋分支 。回饋分支包括負偏壓齊納二極體ZD及光耦合器OPT。 連接知切換調節器T1之旁路終端B者爲電容器C3，其相 對於源電壓係用來穩定切換調節器T1之供應電壓。再者 ，降低轉換器TS具有電阻器R1，其與二極體D2 —起做 爲降低轉換器TS之無線電干擾抑制。電阻器R1之一終端 係連i妾到二極體D2之陽極及電感器L1，而電阻器R2之 545088 五、發明說明（8) 另一終端則接到框架電位。 示於第3圖之切換調節器T1包括一振盪器，其以預定 切換循環持續切換在切換調節器T1中之切換設備開啓及 關閉。結果，在切換調節器T1之汲極D及源極S之間之 連接會被持續地中斷及建立，與場效應電晶體之切換作業 相似。具有切換調節器T i之電氣導電汲極一源極路徑， 電容器C1經由電感器L1及正向偏壓小信號二極D2自可 在電容器C2處獲得之供應電壓被充電。在此期間，磁場 在電感器L 1中建立，而二極體D 1被阻擋。在切換調節器 T1之汲極-源極路徑之阻擋相位期間，儲存在電感器L1 之磁i中之電能被耗盡且被用於對電容器C 1充電。在此 情況下，電容器C 1之充電電流流經二極體D 1。在電容器 C 1處可獲得之供給開口環路控制裝置ST及微控制器MC 之電壓供應之電壓係由切換調整器T1之切換循環所決定 。藉由回饋分支之幫助，切換調節器T1之切換循環，及 橫跨電容器C1之電壓下降會被控制。假使橫跨電容器C j 之電壓下降達到齊納二極體ZD之臨界電壓，則後者會導 電且光耦合器之光發射二極體開始亮起。結果，切換調節 器T 1之致能終端E接收輸入信號，其關閉切換調整器τ! 之切換設備之切換作業之閉合環路控制裝置。所以只要輸 入信號尙在致能終端E，則汲極-源極連接維持中斷，而 電容器C1則不再被充電。一旦橫跨電容器C1之電壓下降 降到低於齊納二極體ZD之臨電壓，則齊納二極體ZD進 -10- 545088 五、發明說明（9) 入阻擋狀態，且在切換調節器T1之致能終端E之輸入信 號消失。結果，在切換調節器T1中用於控制其切換設備 之閉合環路控制裝置重新啓動，且切換設備之切換作業重 新開始。在對應的情況中電容器C 1,重新充電。藉由設定 齊納二極體ZD之臨界電壓到一適當位準’橫跨降低轉換 器TS之電容器C1之輸出電壓可以被設定成想要之値。爲 了供應電能給開口環路控制裝置ST及微控制器MC ’在電 容器C1處產生約爲28V之電壓。藉由下游固定電壓調節 器苑之幫助，自此產生5V之供應電壓給微控制器’而藉 由二位置控制器或電壓分割器的幫助，可產生約1 2 V之供 應電壓給開口環路控制裝置ST。如上述，組件D2及R1 被用做爲降低轉換器TS之無線電干擾抑制。由於電感器 L1之電感及電容器C1之電容及二極體D1之阻障層電容 ，而沒有組合Rl，D2的情況下，造成無線電干擾之自然 振盪在二極體D1自導電狀態至阻擋狀態之轉移中形成。 小信號二極體D2係在電感器L1之放電作業結束時被阻擋 ，即是在儲存於電感器L1之磁場中之能量耗盡後。這可 避免儲存電容器C1之電場中之電能傳回電感器L1。電阻 器R1衰減剩餘的自然振盪。 本發明並不限於在此處的實施例。例如，電壓變壓器 HLV之供應電壓可直接自整流器GL之DC電壓輸出處之 整流後AC線電壓獲得。並不一定要用上升轉換器PFC之 輸出電壓。再者，DC° - DC轉換器可只用於微控制器 -11- 545088 五、發明說明（1〇) MC之電壓供應。在此情況下，微控制器MC之供應電壓 可在沒有固定電壓調節器FS的情況下，在電容器C 1處直 接提供，即是在降低轉換器TS之電壓輸出處。再者，除 了降低轉換器TS以外尙可使用其他適當的DC - DC轉換 器。 符號之說明 GLV DC電壓供應電路 HLV 電壓供應裝置 LP 電燈 MC 微控制器 WR 倒相器 TS 降低轉換器 T1 切換設備 RV 閉合環路控制裝置 ZD 臨界開關 R1，D2 無線電千擾抑制設備 -12-545088 V. Description of the invention (0 The present invention relates to a ballast for operating electric lamps according to the preface of the first item of the scope of the patent application. 0 Field of the invention The present invention relates to modern electronic ballasts for operating electric lamps. In addition to its control device, there is a microcontroller for monitoring and controlling the function of the flow tube and the electric light it operates. The microcontroller also has two-way communication with the central control unit. The central control unit is placed outside the flow tube The central closed loop or open loop used for indoor lighting system to control the indoor lighting system includes a plurality of lighting equipment and a plurality of flow tubes. Conventional European Patent Application EP 0 5 64 8 95 A1 describes for operation The electronic ballast of the low-pressure bleed lamp. This ballast includes an inverter for the CD J power of the inverter; a supply circuit connected to the inverter ’s load; a load circuit for supplying voltage to the lamp, And for supplying electricity Device to the control circuit of the inverter. As mentioned above, in addition to the control circuit of the inverter, modern electronic flux tubes also have a microcontroller which is used to monitor and control the operation of the flux tube and the electric lights connected to it. And can do two-way communication with the control unit located outside the flow tube. For these operations, the microcontroller needs a constant voltage supply, which also operates in the standby mode of the flow tube, which is to continue to supply power to the microcontroller until When the lamp is turned off and the inverter is not operating. The device disclosed in the open application 0 564 895 A1, which is used to supply voltage to the inverter control device, is not suitable for the above-mentioned S. -3- 545088 V. Invention Explanation (2) Invention Description One object of the present invention is to provide an improved voltage supply for general microcontrollers operating electric lamps. This voltage supply reliably provides power to the microcontroller on one hand, even in Also in the standby mode of the flow tube However, on the other hand, there is almost no energy loss. This is achieved in accordance with the present invention by the features of the first scope of the patent application, especially the advantageous configuration of the present invention is described in the appendix of the scope of the patent application. The ballast tube according to the present invention has an inverter for a DC voltage supply circuit of the inverter for supplying voltage to one or more electric lamps-a microcontroller for monitoring and controlling the ballast tube. Or the operation of electric lights' and voltage supply devices for microcontrollers. According to the present invention, the voltage supply device of the microcontroller is designed as a DC-DC converter, whose voltage input is connected to the voltage output 5 of the DC voltage supply circuit of the inverter and its voltage output is connected to the supply of the microcontroller Voltage input. The DC-DC converter can directly free the AC line voltage rectified by the DC voltage supply circuit to generate the supply voltage for the microcontroller. Furthermore, the power consumption of the yoke tube in standby mode can be reduced to about 0.5 W. For DC-] DC converters, the voltage output is also advantageously connected to the supply voltage input of the control device for the inverter switching device. The dimensions of the components of the DC-DC converter are set for use in control devices supplied to microcontrollers and inverters: appropriate high voltages can be obtained at the voltage output of the converter. The DC-DC converter can also be used to supply voltage to the control device. DC--4- DC to 545088 V. Description of the Invention (3) The converter advantageously has a ^ reduction converter or is designed to reduce the converter, because the low voltage DC voltage required to operate the microcontroller can be obtained by Reduce the help of the converter to produce 5 in a simple way and make the power loss of the high output voltage of the white DC voltage supply circuit very low. Reducing the voltage output of the converter can be advantageously formed by an electrolytic capacitor so that, for example, 50 mA The supply current of the office is an inverter in a short time such as 200] ms: the control: the control device: the available 〇 reduce converter switching equipment and the closed rm circuit control device used to control the switching operation are designed to Integrated circuit. Result can reduce the space required to reduce the converter or the device that supplies the voltage to the microcontroller. In particular, the main components of the converter are the switching device and the closed loop. The circuit control device 5 can be integrated to open the inverter. The loop control device is designed as an ASIC (application-specific integrated circuit). 0 In order to reduce the voltage drop across the converter's voltage output, set it as desired. So Provide equipment that can temporarily interrupt the switching operation of the switching device of the reducing converter. These devices advantageously include a critical switch 5 which is arranged to the closed-circuit control device of the reducing converter— 'in the feedback branch. Help, the voltage drop across the voltage output of the reduced converter can be monitored in a simple way and the closed rm of the converter can be closed or activated temporarily. The Zener diode is particularly suitable for critical switching With the help of an appropriately sized Zener diode and an appropriately sized voltage divider, the converter's output is reduced. Pressure may be set to want to be in Zhi square aforementioned feedback branch by means of - an optical retractor and Yu with the source potential electrical isolation in order to exclude the source potential of the periodic change of the cut to reduce converter converter device cut -5 CONVERSION job impact. In order to avoid 545088 V. Description of the invention (4) Avoiding and reducing the radio interference caused by the converter, reducing the converter can be advantageously configured with acoustic radio interference suppression equipment. A small-signal diode and a resistor are advantageously used as radio interference suppression devices. The anode of the diode is connected to the converter reducing inductor, and its cathode is connected to the positive terminal of the converter's DC voltage output. One end of the resistor is connected to the anode of the small-signal diode and the converter inductor, and the other end is connected to the frame potential. Small-signal diodes have only a very low barrier capacitance. At the end of the discharge operation, they have the effect of reducing the inductor of the converter, and the resistor will attenuate the remaining natural oscillation of the circuit. Occurs when the polar body transitions from a conductive state to a blocking state. Brief Description of the Drawings Figure 1 shows a block diagram of a flow tube according to the present invention. Figure 2 shows the schematic diagram of the downconverter of the flow tube in Figure 1. ·· Fig. 3 shows detailed information of the downconverter of the flow tube in Fig. 1. Description of the preferred embodiment% FIG. Vl shows a block diagram representation of an embodiment of the present invention. jtt: The main component of the flow tube is an inverter WR, especially a half-bridge inverter, which is used to operate at least one low-pressure gas discharge lamp LP, especially a fluorescent washing lamp. The half-bridge inverter WR is supplied by the DC voltage supply circuit GLV · Alligator. GLV generates a DC voltage of 400V-450V from the AC line voltage. : PC voltage supply circuit GLV has a module GL for this purpose, which is connected to the line voltage terminal and contains a radio interference suppression filter and 545088. 5. Description of the invention (5) Downstream bridge rectifier GL, GLV 尙 has a rising converter PFC, connected to the DC voltage output of the module GL '. The boost converter PFC is used for power factor correction and can cause approximately sinusoidal current drain drain. The voltage output of the up-conversion φ device or the voltage and output of the DC voltage supply circuit GLV is formed by the intermediate circuit resistor C2. The supply voltage of the inverter WR is supplied to an intermediate circuit capacitor C 2 formed as an electrolytic capacitor. The open loop control device S T includes a driving circuit for driving a switching transistor of the half-bridge inverter W R and the up-converter P F C. It is usually designed to use application specific integrated circuit, ASIC. In addition, the flow tube has a microcontroller MC, which generates a control signal to the drive circuit of the open loop control device ST in order to drive the inverter WR and the switching transistor of the rising converter PFC, and is used to monitor the rising converter PFC Operation status of phaser WR and at least one lamp LP. The microcontroller MC can also be connected to a central control unit (not shown) via an interface (not shown), which is arranged on the outside of the flow tube and is used for the central control of the function of the entire lighting system, wherein the flow according to the invention The tube is a component of the lighting system. Via these interfaces, the microcontroller or the flow tube receives control instructions from the central control unit in order to turn on or off and adjust the brightness of at least one lamp LP. Furthermore, information about the operating status of the flow tube or at least one lamp LP is sent to the central control unit via these interfaces. For supplying voltage to the microcontroller MC, the voltage supply device HLV is used as a DC-DC converter. The voltage input for the DC-DC converter HLV is a voltage output connected to the intermediate circuit capacitor C2 or to the DC voltage supply circuit GLV. The first voltage output of the DC-DC converter HLV is connected to the micro-control 545088. 5. Description of the invention (6) The supply voltage input of the MC and the second voltage output of the DC-DC converter HLV is connected to the open loop control device. ST supply voltage input. The DC-DC converter HLV generates a DC of about 5V from the DC voltage provided in the intermediate circuit capacitor C2, the voltage to the microcontroller, and a DC voltage of at least 12V to the voltage supply of the open loop control device ST. The DC-DC converter HLV includes a reduction converter TS and a downstream fixed voltage regulator FS for this purpose, which regulates and reduces the output voltage of the converter TS to about 5V to the microcontroller MC. The DC-DC converter HLV supplies power to the microcontroller regardless of the operating state of the inverter WR and the up-converter PFC. Even in the standby mode of the flow tube, when the inverter WR and the up-converter PFC are turned off, the DC-DC converter HLV generates a supply voltage of about 5V to the microcontroller MC. In this case, the AC line voltage rectified by the module GL crosses the intermediate circuit capacitor C2 as the input voltage of the DC-DC converter HLV. Fig. 2 shows the reduction converter TS of the DC-DC converter HLV. The voltage input of the down converter TS is connected to the intermediate circuit capacitor C2. The voltage drop across capacitor C2 is used to reduce the input voltage to the converter TS. The reduction converter TS has a switching device T1, a closed loop control device RV for controlling the switching operation of the switching device T1, a converter inductor L1, a diode D1 and an electrolytic capacitor C1. Electrolytic capacitor C1 forms a voltage output that reduces converter TS. The closed-loop control device is connected to the capacitor C1 via a feedback branch in order to monitor the voltage drop across the capacitor C1 and control the switching operation of the switching device T1. When the switch T1 is turned on, the capacitance is 545088. V. Description of the invention (7) The inductor C1 is charged via the inductor L1 from the rectified AC line voltage available in the capacitor C2. In the inductor L1, a magnetic field is established at the same time. Diode D 1 is in a blocking state. During the blocking phase of the switch T 1, the energy stored in the magnetic field of the inductor L 1 · is depleted and given to the capacitor C 1. In this case, the capacitor C1 is recharged by the inductor L1 during this time, and the diode D1 is in a conductive state. The supply voltage of the fixed voltage regulator FS and the open loop control device ST available at the electrolytic capacitor C 1 is based on the switching cycle of the switching device T1. Fig. 3 shows the reduction converter TS of the DC-DC converter HLV in detail. The switching regulator is designed as an integrated circuit and is commercially represented by TNY 253, which is used as the switching device T 1. The closed-loop control device RV is integrated in the switching regulator T 1. The drain terminal D of the switching regulator T1 is connected to the positive terminal of the capacitor C2. The source terminal S of the switching regulator T1 is connected to the positive terminal of the electrolytic capacitor C1 via the converter inductor L1 and the forward bias diode D2. Furthermore, the source terminal S is connected to the cathode of the diode D !, and its anode is connected to the internal frame potential of the circuit. The enabling terminal E of the switching regulator T1 is connected to the feedback branch of the capacitor C1. The feedback branch includes a negatively biased Zener diode ZD and an optocoupler OPT. The bypass terminal B connected to the switching regulator T1 is a capacitor C3, which is used to stabilize the supply voltage of the switching regulator T1 relative to the source voltage. Furthermore, the reduction converter TS has a resistor R1 which, together with the diode D2, serves as a reduction of the radio interference suppression of the converter TS. One terminal of the resistor R1 is connected to the anode of the diode D2 and the inductor L1, and the resistor R2 is 545088. 5. Description of the invention (8) The other terminal is connected to the frame potential. The switching regulator T1 shown in FIG. 3 includes an oscillator that continuously switches the switching device in the switching regulator T1 on and off in a predetermined switching cycle. As a result, the connection between the drain D and the source S of the switching regulator T1 is continuously interrupted and established, similar to the switching operation of a field effect transistor. With the electrically conductive drain-source path of the switching regulator T i, the capacitor C1 is charged from the supply voltage available at the capacitor C2 via the inductor L1 and the forward-biased small-signal diode D2. During this time, a magnetic field is established in the inductor L 1 and the diode D 1 is blocked. During the blocking phase of the drain-source path of the switching regulator T1, the electrical energy stored in the magnet i of the inductor L1 is depleted and used to charge the capacitor C1. In this case, the charging current of the capacitor C 1 flows through the diode D 1. The voltage available to the open loop control device ST and the microcontroller MC at the capacitor C1 is determined by the switching cycle of the switching regulator T1. With the help of the feedback branch, the switching cycle of the switching regulator T1 and the voltage drop across the capacitor C1 will be controlled. If the voltage across the capacitor Cj drops to the threshold voltage of the Zener diode ZD, the latter will conduct electricity and the light emitting diode of the optocoupler will start to light up. As a result, the enabling terminal E of the switching regulator T 1 receives the input signal, which closes the closed-loop control device of the switching operation of the switching device of the switching regulator τ !. So as long as the input signal is at the enable terminal E, the drain-source connection remains interrupted, and the capacitor C1 is no longer charged. Once the voltage across capacitor C1 drops below the voltage of the Zener diode ZD, the Zener diode ZD enters -10- 545088. 5. Description of the invention (9) The blocking state is entered and the regulator is switched The input signal of the enabling terminal E of T1 disappears. As a result, the closed-loop control device for controlling the switching device in the switching regulator T1 is restarted, and the switching operation of the switching device is restarted. In the corresponding case, the capacitor C 1, is recharged. By setting the threshold voltage of the Zener diode ZD to an appropriate level, the output voltage across the capacitor C1 of the reduction converter TS can be set as desired. In order to supply electric power to the open loop control device ST and the microcontroller MC ', a voltage of about 28V is generated at the capacitor C1. With the help of a downstream fixed voltage regulator, a 5V supply voltage is generated to the microcontroller from now on, and with the help of a two-position controller or a voltage divider, a supply voltage of about 12 V can be generated to the open loop Control device ST. As mentioned above, the components D2 and R1 are used to reduce the radio interference suppression of the converter TS. Due to the inductance of the inductor L1 and the capacitance of the capacitor C1 and the barrier layer capacitance of the diode D1, without the combination of R1 and D2, the natural oscillation of radio interference is caused by the diode D1 from the conductive state to the blocked state Formed during transfer. The small-signal diode D2 is blocked at the end of the discharge operation of the inductor L1, that is, after the energy stored in the magnetic field of the inductor L1 is exhausted. This prevents the electric energy in the electric field of the storage capacitor C1 from being transmitted back to the inductor L1. Resistor R1 attenuates the remaining natural oscillations. The invention is not limited to the embodiments herein. For example, the supply voltage of the voltage transformer HLV can be obtained directly from the rectified AC line voltage at the DC voltage output of the rectifier GL. It is not necessary to use a boost converter PFC output voltage. Furthermore, the DC ° -DC converter can only be used for microcontrollers -11-545088 V. Description of the invention (1) MC voltage supply. In this case, the supply voltage of the microcontroller MC can be provided directly at the capacitor C 1 without the fixed voltage regulator FS, that is, at the voltage output of the converter TS. Furthermore, in addition to reducing the converter TS, other suitable DC-DC converters can be used. Explanation of symbols GLV DC voltage supply circuit HLV voltage supply device LP lamp MC microcontroller WR inverter TS reduction converter T1 switching device RV closed loop control device ZD critical switch R1, D2 radio interference suppression device -12-